<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap 实例 - 分割的按钮下拉菜单</title>
  <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<div class="btn-group">
  <button type="button" class="btn btn-default">默认</button>
  <button type="button" class="btn btn-default dropdown-toggle"
          data-toggle="dropdown">
    <span class="caret"></span>
    <span class="sr-only">切换下拉菜单</span>
  </button>
  <ul class="dropdown-menu" role="menu">
    <li><a href="#">功能</a></li>
    <li><a href="#">另一个功能</a></li>
    <li><a href="#">其他</a></li>
    <li class="divider"></li>
    <li><a href="#">分离的链接</a></li>
  </ul>
</div>
<div class="btn-group">
  <button type="button" class="btn btn-primary">原始</button>
  <button type="button" class="btn btn-primary dropdown-toggle"
          data-toggle="dropdown">
    <span class="caret"></span>
    <span class="sr-only">切换下拉菜单</span>
  </button>
  <ul class="dropdown-menu" role="menu">
    <li><a href="#">功能</a></li>
    <li><a href="#">另一个功能</a></li>
    <li><a href="#">其他</a></li>
    <li class="divider"></li>
    <li><a href="#">分离的链接</a></li>
  </ul>
</div>

</body>
</html>